Warp-stop-motion apparatus



Patented Mar. 28, |899.

l No. 622,|83.

G. 0. DRAPER.

WARP STOP HOTIUN APPARATUS.

4(No Model Je www Elven/C07? Ge or l'OA To all whom t may concern.'

eine.

I GEORGE O. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSlGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, l\'lAlNE.

WARP-STOP-MOTION APPARATUS.

SPECIFICATION forming part of Letters Patent No. 622,183, datedliarch 2 8, 1899. Application filed .October 14,1898. Serial No. 693.477. (VNO model.)

Be it known that I, GEORGE O. DRAPER, of Hopedale, county of Worcester, State of Massach usetts, have invented an Improvement in Warp-Stop-Motion' Apparatus, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My present invention relates to that type V- of warp-stop-motion mechanisms wherein the engagement and arrest of a normally-vibrating feeler is effected by the movement into abnormal position of one of a series of detectors maintained by normal warp-threads in inoperative position, the arrest of the feeler operating to automatically eec't the stoppage of the apparatus with which the stop-motion mechanism cooperates.

' In my present invention the detectors have a vertical movement' in a suitable guide having an opening for the admission of the feeler as it is vibrated under normal conditions, the feeler at such time moving into the guide below the lower ends of the detectors While they are Aunder the control ofintact and properlytensioned warp-threads. lf a warp-thread slackens or fails, its detector will drop into the path of and engage and arrest the feeler. I have provided means for limiting the downward movement of a released detector and to support the lower end of the same against twisting or bending when engaged by the feeler.

My invention is herein Villustrated as applied to a loom, a suiicient portion thereof being shown to be understood; but my invention is not restricted solely to use in a loom, as it may be applied equally well to other Warp-treating mechanism, wherein it is desirable to effect stoppage of the apparatus automatically upon failure or slackness of one of the warp-threads.

Figure 1 isa longitudinal sectional view of a portion of a loom with one embodiment of my invention applied thereto, taken on the line or Fig. 2, the major working mechanism of the loom being omitted, as it forms no part oi this invention. Fig. 2 is a partial rear elevation of the apparatus shown in Fig. 1. Fig. is an enlarged detail of a part of the apparatus shown in Fig. 1, and Fig. 4 is an enlarged perspective detail of the limiting-stop for the detectors.

The harnesses H, whip bar or roll W, leaserods L L', and theshipper-lever S may be and are of usual or well-known construction, and I have herein shown the detectors d asy located back of the lease-rods, said detectors being shown as elongated thin metal plates, provided each with a warp eye or opening dx, and in Figs. 1 and 3 said detectors are shown as longitudinally slotted at their upper ends at d' to receive a guide-bar m, extended across the loom and supported in suitable brackets M, attached to the loom-frame A. The bar m serves to steady the upper ends of the detectors when held in normal or full-line position by the warp-threads, as shown in Figs. 1 and 3.

The lower ends of the detectors enter loosely a box-like guide comprising front and back plates g g', the back plate being of greater depth than the front plate Vto leave a longitudinal opening at the front of the guide along its lower portion for the entrance of the feeler ax as the latter is normally vibrated, the path of movement of the feeler being below the detectors when controlled by their warp-threads. The said feeler ax is herein shown as an angie-ironsuitably secured to arms fast on a l shaft a, hav-ing bearings in' (see Fig. 2) in the brackets M and vibrated by any suit-able or desired mechanism, one form of which will be hereinafter described. The back plate g' at its lower portion is opposite to the continuous edge of the feeler, and when a detector is released, as by the breakage or slackness of its warp-thread, it drops into dottedline position, Figs. 1 and Saso that one of its upright ed ges will engage and arrest the feeler, the plate g at such time actingl as a backstop to support a detector against the strain exerted thereon by the feeler.

In order to limit the downward movement of a released detector and at the same time to prevent it from twisting laterally,l extend a bar h across the loom beneath said detectors, said bar having formed upon its upper edge, as shown best in Fig. l, a series oi deep roo ' the ;oint noting equal to or greater than the Width of a detector, said stop-bar being supported in suitable ina-nner on the brackets M.

lVhen a detector is released, as has been described, it drops, the inclined sides of the teeth directing its lower end into one of the notches, while those teeth at each side of the detector engage the latter andhold it from twisting or bending while subject to pressure or strain due to the engagement therewith by the feeler.

Inasm uch as the toothed stop-bar 71. prevents twisting of the detectors, I am enabled to dispensewith a notched or toothed feeler.

To elieet the normal vibration of the feeler, the rocleshatt o, is herein shown as provided with an arni a2, extending oppositely to the feeler and having pivot/ally connected to it a bent arm u, provided with a bunter af anda toe ft, cooperating with an edge cani D, pret` erably on the earn-shaft C, said bunter o being hus moved into and out of the path of one or more tappetsf of a cam F, also fast on the shaft C. When the feeler is arrested, the bunter uf is held np in the path of the tappei, engagement therewith swinging the arm nf* lo the rear, said arm being slotted at u to receive :i stud rl on a. short lever (im, pivoted at its upper end at 117 to a link d8, hooked n r1. d the eanrshait at of, the other end of link beingjointed to the :iran e of a rock- ;iait o, provided with a knock-olif arm e' for the s per-lever. 'lhe lower end of the lecr .uni arm f.' areeonnoeted by a rod e2, as the lever-fuleruin when the bunier of is acted upon bythe tappetuzini the swing of the upper end of said lel Ver moving` the link d* longitudinally to Openste the knock-oli. arm and release the shipper-harnlle S. The i'eeler is swung toward the detectors by the weight of the arm rc3 and its eonrwuferl parts., the reverse or outward swingo'llhe feeler beingefeeted bytbeeam l).

lily invention is not restricted to the p'.y else emistruetion and arrangcnnnt herein shown, as the same may be modified or rear d c 'rilileparting from the spirit and v mention.

:fully leseri bed my invention, what im', and desire to secure by Letters Nutt-nt, is

l. In an apparatus oi' the class described, a normally-vibrating feelor, stopping means operated by or through arrest of the ieelor, a series et' verticallyanoval)le deteetors normally con trolied by the warp-tbreznls andl held out.oi` the patirol' movement of; the feeler, a guide l`or said detectors, and a stopbar eX- tended beneath the lower ends of the deteotors and provided with npturned bevel-sided teeth to position the lower end of and p're-l vent twisting of a detector when engaged by the feeler, the edges of the teeth being parallel with the width of the detectors.

2. In an apparatus of the class described, a normallyfvibrating feeler, stopping means operated by or through arrest of the leeler, a box-like guide adjacent the feeler and having a longitudinal opening in its side to be normally entered by the feeler, a series of detectors vertically movable in said guide and when controlled by the warp-threads held with their lower ends above the side opening of the guide, the lower end of a released de lector engaging and arrestngthe feeler, and a stop-bar beneath the open end of the guide, provided with upturned bevel-sided teeth to position the lower end and prevent twisting of a detector when engaged by the feeler.

In an apparatus of the class described, a normallyfvibrating feeler, stopping means operated byor through arrest of the feeler, a series of vertically-movable thin, fiat detectors controlled by normal warpthreads and thereby held in abnormal, inoperative posi,i tion, a guide for the detectors, the lower end o1" a detector released by slackness or looseness of its warp-thread engaging and arrest` ing,l the leeler, and means located below the feeler-path to aet upon the fla-t opposite faces of a detector at or near its lower end when engaged by the feeler, to prevent twisting or bending of the detector.

4. ln an apparatus of the class described,

a normally-vibrating feeler, stopping means 93 operated by or through arrest of the feeler, a series of vertically-movable thin, llat detectors controlled by normal warp-threads and thereby held in abnormal, inoperative position, a guide for the detectors, the lowerend loo of a detector released by slackness or looseness ol.' its warp-threml engaging and arresting the roeier, a boek-rest for the rear edge of a detector when engaged by the roeier, :t stop located below and to limit the movement of a released detector, and means below the feeler-pah to act upon the oppo site flat faces and prevent twisting of such detector.

In testimony whereof l have signed my i naine to this specification in the presence oi' two subseribing wit nennt-s.

GEORGE H, lllMlIlt.

W itnosses:

downward loi` 

